fichlt i'm using tweeter to send pictures from space. >> i use tweet tore keep in touch. >>reporter: even betty white know about his twitter. >> that's my cell. i'm also on facebook. and the twitter. >> originally it was me twee tweeting to myself. >>reporter: such an exciting time for you. >> so much fun. >>reporter: that was twitter co-founder jack dorcey talking about being the first person to send a tweet 5 years ago today. these days lady gaga has the most popular account with nearly 9 million followers. she is followed by justin bieber, britney spares, president obama and kim kardashian. united states accounts for more than half of all twitter users by the wait a minute uk canada australia and brazil are the next big users and might not be surprised that it is most popular with 20 to 24-year-olds. they tend to like the twitter. >> wilt is true. birth order matters even when it comes to >> wilt is true. birth order matters even when it comes to our health and our money. stay this is your captain speaking, we are fourteenth in line for takeoff. looks like it's bumper